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authorStephen Kitt <skitt@debian.org>2016-05-27 10:11:04 +0200
committerManuel A. Fernandez Montecelo <manuel.montezelo@gmail.com>2016-05-27 14:28:33 +0100
commit752fd7247bc223bcea35bd89cf56d1c08ead9ba6 (patch)
treeb4a428f847a963738faaf24c8eff070fdb03a3a5 /tests/test-frexpl.c
parent9f7d4fa477ff2a51d7c932b13d57ac22dc033105 (diff)
parenta9a31b1de5776a3b08a82101a4fa711294f0dd1d (diff)
Imported Debian patch 0.9.6+really0.9.3-0.1debian/0.9.6+really0.9.3-0.1
Diffstat (limited to 'tests/test-frexpl.c')
-rw-r--r--tests/test-frexpl.c183
1 files changed, 164 insertions, 19 deletions
diff --git a/tests/test-frexpl.c b/tests/test-frexpl.c
index fc2a4de0..8d9d41d2 100644
--- a/tests/test-frexpl.c
+++ b/tests/test-frexpl.c
@@ -1,5 +1,5 @@
/* Test of splitting a 'long double' into fraction and mantissa.
- Copyright (C) 2007-2015 Free Software Foundation, Inc.
+ Copyright (C) 2007-2010 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -27,8 +27,6 @@ SIGNATURE_CHECK (frexpl, long double, (long double, int *));
#include "fpucw.h"
#include "isnanl-nolibm.h"
-#include "minus-zero.h"
-#include "infinity.h"
#include "nan.h"
#include "macros.h"
@@ -37,18 +35,6 @@ SIGNATURE_CHECK (frexpl, long double, (long double, int *));
#undef exp
#define exp exponent
-#undef INFINITY
-#undef NAN
-
-#define DOUBLE long double
-#define VOLATILE
-#define ISNAN isnanl
-#define INFINITY Infinityl ()
-#define NAN NaNl ()
-#define L_(literal) literal##L
-#define MINUS_ZERO minus_zerol
-#define MAX_EXP LDBL_MAX_EXP
-#define MIN_EXP LDBL_MIN_EXP
/* On MIPS IRIX machines, LDBL_MIN_EXP is -1021, but the smallest reliable
exponent for 'long double' is -964. Similarly, on PowerPC machines,
LDBL_MIN_EXP is -1021, but the smallest reliable exponent for 'long double'
@@ -61,18 +47,177 @@ SIGNATURE_CHECK (frexpl, long double, (long double, int *));
#else
# define MIN_NORMAL_EXP LDBL_MIN_EXP
#endif
-#define FREXP frexpl
-#define RANDOM randoml
-#include "test-frexp.h"
+
+/* On HP-UX 10.20, negating 0.0L does not yield -0.0L.
+ So we use minus_zero instead.
+ IRIX cc can't put -0.0L into .data, but can compute at runtime.
+ Note that the expression -LDBL_MIN * LDBL_MIN does not work on other
+ platforms, such as when cross-compiling to PowerPC on MacOS X 10.5. */
+#if defined __hpux || defined __sgi
+static long double
+compute_minus_zero (void)
+{
+ return -LDBL_MIN * LDBL_MIN;
+}
+# define minus_zero compute_minus_zero ()
+#else
+long double minus_zero = -0.0L;
+#endif
+
+static long double
+my_ldexp (long double x, int d)
+{
+ for (; d > 0; d--)
+ x *= 2.0L;
+ for (; d < 0; d++)
+ x *= 0.5L;
+ return x;
+}
int
main ()
{
+ int i;
+ long double x;
DECL_LONG_DOUBLE_ROUNDING
BEGIN_LONG_DOUBLE_ROUNDING ();
- test_function ();
+ { /* NaN. */
+ int exp = -9999;
+ long double mantissa;
+ x = NaNl ();
+ mantissa = frexpl (x, &exp);
+ ASSERT (isnanl (mantissa));
+ }
+
+ { /* Positive infinity. */
+ int exp = -9999;
+ long double mantissa;
+ x = 1.0L / 0.0L;
+ mantissa = frexpl (x, &exp);
+ ASSERT (mantissa == x);
+ }
+
+ { /* Negative infinity. */
+ int exp = -9999;
+ long double mantissa;
+ x = -1.0L / 0.0L;
+ mantissa = frexpl (x, &exp);
+ ASSERT (mantissa == x);
+ }
+
+ { /* Positive zero. */
+ int exp = -9999;
+ long double mantissa;
+ x = 0.0L;
+ mantissa = frexpl (x, &exp);
+ ASSERT (exp == 0);
+ ASSERT (mantissa == x);
+ ASSERT (!signbit (mantissa));
+ }
+
+ { /* Negative zero. */
+ int exp = -9999;
+ long double mantissa;
+ x = minus_zero;
+ mantissa = frexpl (x, &exp);
+ ASSERT (exp == 0);
+ ASSERT (mantissa == x);
+ ASSERT (signbit (mantissa));
+ }
+
+ for (i = 1, x = 1.0L; i <= LDBL_MAX_EXP; i++, x *= 2.0L)
+ {
+ int exp = -9999;
+ long double mantissa = frexpl (x, &exp);
+ ASSERT (exp == i);
+ ASSERT (mantissa == 0.5L);
+ }
+ for (i = 1, x = 1.0L; i >= MIN_NORMAL_EXP; i--, x *= 0.5L)
+ {
+ int exp = -9999;
+ long double mantissa = frexpl (x, &exp);
+ ASSERT (exp == i);
+ ASSERT (mantissa == 0.5L);
+ }
+ for (; i >= LDBL_MIN_EXP - 100 && x > 0.0L; i--, x *= 0.5L)
+ {
+ int exp = -9999;
+ long double mantissa = frexpl (x, &exp);
+ ASSERT (exp == i);
+ ASSERT (mantissa == 0.5L);
+ }
+
+ for (i = 1, x = -1.0L; i <= LDBL_MAX_EXP; i++, x *= 2.0L)
+ {
+ int exp = -9999;
+ long double mantissa = frexpl (x, &exp);
+ ASSERT (exp == i);
+ ASSERT (mantissa == -0.5L);
+ }
+ for (i = 1, x = -1.0L; i >= MIN_NORMAL_EXP; i--, x *= 0.5L)
+ {
+ int exp = -9999;
+ long double mantissa = frexpl (x, &exp);
+ ASSERT (exp == i);
+ ASSERT (mantissa == -0.5L);
+ }
+ for (; i >= LDBL_MIN_EXP - 100 && x < 0.0L; i--, x *= 0.5L)
+ {
+ int exp = -9999;
+ long double mantissa = frexpl (x, &exp);
+ ASSERT (exp == i);
+ ASSERT (mantissa == -0.5L);
+ }
+
+ for (i = 1, x = 1.01L; i <= LDBL_MAX_EXP; i++, x *= 2.0L)
+ {
+ int exp = -9999;
+ long double mantissa = frexpl (x, &exp);
+ ASSERT (exp == i);
+ ASSERT (mantissa == 0.505L);
+ }
+ for (i = 1, x = 1.01L; i >= MIN_NORMAL_EXP; i--, x *= 0.5L)
+ {
+ int exp = -9999;
+ long double mantissa = frexpl (x, &exp);
+ ASSERT (exp == i);
+ ASSERT (mantissa == 0.505L);
+ }
+ for (; i >= LDBL_MIN_EXP - 100 && x > 0.0L; i--, x *= 0.5L)
+ {
+ int exp = -9999;
+ long double mantissa = frexpl (x, &exp);
+ ASSERT (exp == i);
+ ASSERT (mantissa >= 0.5L);
+ ASSERT (mantissa < 1.0L);
+ ASSERT (mantissa == my_ldexp (x, - exp));
+ }
+
+ for (i = 1, x = 1.73205L; i <= LDBL_MAX_EXP; i++, x *= 2.0L)
+ {
+ int exp = -9999;
+ long double mantissa = frexpl (x, &exp);
+ ASSERT (exp == i);
+ ASSERT (mantissa == 0.866025L);
+ }
+ for (i = 1, x = 1.73205L; i >= MIN_NORMAL_EXP; i--, x *= 0.5L)
+ {
+ int exp = -9999;
+ long double mantissa = frexpl (x, &exp);
+ ASSERT (exp == i);
+ ASSERT (mantissa == 0.866025L);
+ }
+ for (; i >= LDBL_MIN_EXP - 100 && x > 0.0L; i--, x *= 0.5L)
+ {
+ int exp = -9999;
+ long double mantissa = frexpl (x, &exp);
+ ASSERT (exp == i || exp == i + 1);
+ ASSERT (mantissa >= 0.5L);
+ ASSERT (mantissa < 1.0L);
+ ASSERT (mantissa == my_ldexp (x, - exp));
+ }
return 0;
}